<template>
  <div>
    <nav-bar :back="'white'">
      <div slot="left" class="back" @click="backClick">
        <img src="~assets/img/detail/back.png" alt="">
      </div>

      <div slot="center" class="title">
        <div v-for="(item,index) in titles"
             class="title-item"
             :class="{active:index === currentIndex}"
             @click="itemClick(index)">{{item}}</div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
  import NavBar from "@/components/common/navbar/NavBar";
  export default {
    name: "DetailNavBar",
    components:{
      NavBar
    },
    data() {
      return {
        titles:['商品','参数','评论','推荐'],
        currentIndex: 0,
      }
    },
    methods:{
      itemClick(index){
        this.currentIndex = index;
        this.$emit('itemClick',index)
      },
      backClick(){
        this.$router.go(-1)
      }
    }
  }
</script>

<style scoped>
  .title{
    display: flex;
  }
  .title-item{
    flex: 1;
  }
  .active{
    //background: rgb(240,240,240);
    color: red;
  }
  .back img {
    width: 20px;
    height: 20px;
    margin-top: 13px;
  }
</style>
